It doesn't, proof of work is what makes Bitcoin unique.
(1) Having to spend physical resources better aligns incentives
(2) Proof of work is decentralized and fair
Proof of work explicitly gives those with more resources more power. How is that "fair"? Bitcoiners complain that staking systems are somehow worse, but it's the exact same dynamic, just one uses less electricity.
BTC doesn't purport to fix "dog-eat-dog" or "might is right" in human society, but does "fix" governments being able to manipulate the value, supply etc of money.
Any amount of money, as long as it is sufficiently divisible, is capable of facilitating trade within an economy. The idea that somehow money has to increase over time is one of the most non-sensical idea.
"Thus inflation becomes the most important psychological resource of any economic policy whose consequences have to be concealed; and so in this sense it can be called an instrument of unpopular, i.e. of anti-democratic, policy, since by misleading public opinion it makes possible the continued existence of a system of government that would have no hope of the consent of the people if the circumstances were clearly laid before them."
